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离子束技术可以研究气态下离子和分子的相互作用,近来又用于研究离子和吸附分子的相互作用.通常气体分子在单晶表面上的吸附是定向的,故这种吸附不仅可以用来研究不同方向入射的离子束与吸附分子的相互作用,从中还可以获得有关吸附分子和表面基片原子之间的键合信息及入射离子在表面的中和效应信息.本文研究了10eV 的 N~+离子束在清洁的和吸附了 CO 分子的 Ni(100)和 Cu(100)表面上的中和效应及其与 CO 的相互作用.选择该系统的原因是:(1)基态 N_2分子对清洁的 Ni,Cu 表面是不活泼的,在室温下无化学吸附;(2)关于 CO 在 Ni(100)和 Cu(100)表面上的化学吸附特性已有了充分的了解;(3)有关气相的 N~+-CO 系统的离子-分子相互作用亦已有了较为完整的研究.所以本文研究结果便于
Ion beam technology can be used to study the interaction of ions and molecules in a gaseous state and has recently been used to study the interaction between ions and adsorbed molecules. Usually, the adsorption of gas molecules on a single crystal surface is directional. Therefore, this adsorption can not only be used to study The interaction between the incident ion beams and the adsorbed molecules in different directions can also obtain the information about the bonding between the adsorbed molecules and the surface substrate atoms and the neutralization effect of the incident ions on the surface.In this paper, The neutralization effect of ion beam on the clean and adsorbed CO molecules on Ni (100) and Cu (100) surfaces and its interaction with CO. The reason for choosing this system is that: (1) Ni, Cu surface is not active, at room temperature without chemical adsorption; (2) on the Ni (100) and Cu (100) surface of the chemical adsorption characteristics have been fully understood; (3) The ion-molecular interaction of N ~ + -CO system has also been studied quite completely.